Hi there! My name is***** am a computer professional with over 15 years of experience with both Mac and Windows computers, phones, tablets, and printers. It would be my pleasure to assist you with this. Let's start by checking your trash bin, if you have not already emptied it.
If you have already emptied the trash bin, please login to https://www.icloud.com/ with your Apple id and password ***** then click on Photos. There is a possibility that your photos may still be there. If not, please let me know as there are some utilities that may be able to help you recover the photos.
I am assuming that you don't have a Time Machine backup. If I am wrong and you do, please let me know that as well, and I will walk you through the process of restoring from your most recent backup.